body {
  background-color: #48a0f8;
}
#logo {
  margin: 20px 0 0 240px;
}
.box {
  width: 400px;
  height: 310px;
  background-color: sandybrown;
  box-shadow: 5px 5px 5px 5px;
  position: absolute;
  /* 相对于定位的父级位置 */
  left: 50%;
  top: 50%;
  /* 先对于自己本身的宽高度 */
  transform: translate(-50%,-50%);
}
h1 {
  height: 60px;
  line-height: 60px;
  text-align: center;
}
.layui-form {
  margin: 0 25px;
}
.layui-form-item {
  position: relative;
}
.layui-icon {
  position: absolute;
  left: 9px;
  top: 9px;
}
.layui-input {
  padding-left: 27px;
}
.register {
  display: none;
}